package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;
import java.util.List;
import java.util.Set;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Resource
    private DishService dishService;
    @Resource
    private RedisTemplate redisTemplate;
    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        log.info("根据分类id查询菜品:{}", categoryId);

        String key = "dish_"+categoryId;
        //接到请求先到redis 中查询是否已经缓存 如果已经缓存则 直接取redis中的数据
        if (redisTemplate.hasKey(key)) {
            List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
            return Result.success(list);
        }
        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品

        List<DishVO> list = dishService.listWithFlavor(dish);
        //将数据库中查询到的值 缓存到redis中
        redisTemplate.opsForValue().set(key, list);
        return Result.success(list);
    }


    /**
     * 清理缓存数据
     * @param pattern
     */
    private void cleanCache(String pattern){
        Set keys = redisTemplate.keys(pattern);
        redisTemplate.delete(keys);
    }

}
